Hi!
I've been trying to install gento on a sparc station but i can't make xorg to run on it. With kernel 2.4.27 all i could was X process consuming 99.9 % of one cpu.
Now i emerged kernel 2.6.5 wich is now running and detects perfectly the graphic card on boot (atyfb: ATI Rage XL and fb0).
When i do startx it simple not detect the graphic card, if anyone as a similiar system i would thank any help.

#
# General setup
#
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
# CONFIG_BSD_PROCESS_ACCT is not set
CONFIG_SYSCTL=y
CONFIG_LOG_BUF_SHIFT=15
CONFIG_HOTPLUG=y
# CONFIG_IKCONFIG is not set
# CONFIG_EMBEDDED is not set
CONFIG_KALLSYMS=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set

#
# General setup
#
CONFIG_BBC_I2C=m
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
CONFIG_SMP=y
# CONFIG_PREEMPT is not set
CONFIG_NR_CPUS=4
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
CONFIG_US3_FREQ=m
CONFIG_US2E_FREQ=m
CONFIG_CPU_FREQ_PROC_INTF=y
CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=m
CONFIG_CPU_FREQ_GOV_USERSPACE=m
# CONFIG_CPU_FREQ_24_API is not set
CONFIG_SPARC64=y
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_HUGETLB_PAGE_SIZE_4MB=y
# CONFIG_HUGETLB_PAGE_SIZE_512K is not set
# CONFIG_HUGETLB_PAGE_SIZE_64K is not set
CONFIG_GENERIC_ISA_DMA=y
CONFIG_SBUS=y
CONFIG_SBUSCHAR=y
CONFIG_SUN_AUXIO=y
CONFIG_SUN_IO=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
CONFIG_RTC=y
# CONFIG_PCI_LEGACY_PROC is not set
# CONFIG_PCI_NAMES is not set
CONFIG_SUN_OPENPROMFS=m
CONFIG_SPARC32_COMPAT=y
CONFIG_COMPAT=y
CONFIG_UID16=y
CONFIG_BINFMT_ELF32=y
# CONFIG_BINFMT_AOUT32 is not set
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
# CONFIG_SUNOS_EMUL is not set
CONFIG_SOLARIS_EMUL=m

#
# Graphics support
#
CONFIG_FB=y
CONFIG_FB_PM2=m
# CONFIG_FB_PM2_FIFO_DISCONNECT is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_MATROX is not set
# CONFIG_FB_RADEON_OLD is not set
# CONFIG_FB_RADEON is not set
CONFIG_FB_ATY128=y
CONFIG_FB_ATY=y
CONFIG_FB_ATY_CT=y
CONFIG_FB_ATY_GX=y
CONFIG_FB_ATY_XL_INIT=y
# CONFIG_FB_SIS is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_SBUS is not set
CONFIG_FB_PCI=y
# CONFIG_FB_VIRTUAL is not set

#
# Console display driver support
#
# CONFIG_MDA_CONSOLE is not set
# CONFIG_PROM_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_PCI_CONSOLE=y
CONFIG_FONTS=y
# CONFIG_FONT_8x8 is not set
# CONFIG_FONT_8x16 is not set
# CONFIG_FONT_6x11 is not set
# CONFIG_FONT_PEARL_8x8 is not set
# CONFIG_FONT_ACORN_8x8 is not set
CONFIG_FONT_SUN8x16=y
# CONFIG_FONT_SUN12x22 is not set

#
# Logo configuration
#
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
# CONFIG_LOGO_LINUX_CLUT224 is not set
CONFIG_LOGO_SUN_CLUT224=y

#
# Misc Linux/SPARC drivers
#
CONFIG_SUN_OPENPROMIO=y
CONFIG_SUN_MOSTEK_RTC=y
CONFIG_OBP_FLASH=m
# CONFIG_SUN_BPP is not set
# CONFIG_SUN_VIDEOPIX is not set
# CONFIG_SUN_AURORA is not set

#
# Memory Technology Devices (MTD)
#
# CONFIG_MTD is not set

#
# Block devices
#
# CONFIG_BLK_DEV_FD is not set
# CONFIG_PARIDE is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_CARMEL=m
# CONFIG_BLK_DEV_RAM is not set

#
# Kernel hacking
#
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_SLAB is not set
CONFIG_MAGIC_SYSRQ=y
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_BUGVERBOSE is not set
# CONFIG_DEBUG_DCFLUSH is not set
# CONFIG_DEBUG_INFO is not set
# CONFIG_STACK_DEBUG is not set
# CONFIG_DEBUG_BOOTMEM is not set
CONFIG_HAVE_DEC_LOCK=y

I tested with several combinations of BusID to match the lspci result but with no success, and commented it out too. Maybe one of the modules or kernel configuration is causing a conflit, with kernel 2.4.27 at least the board was detected.

I note that your xorg was built with kernel 2.4.27, but you
are currently running 2.6.5. Somewhere in 2.6.x tree (i forget
exactly where) there was some confusion with PCI busids
(in particular the PCI domain id, being 4 digits vs 2).

I already had rebuild xorg-x11 to k 2.6.5 with the same results.
using driver fbdev i could get X and kde running.
But i'll try to install 2.6.9 & emerge xorg-x11 and try to get around the pci detection problem.